Question1
A small metal ball, carrying a net charge of q_1 = -2.40 mu C, is held in a stationary position by insulating supports. A second small metal ball, with a net charge of q_2 = -7.30 mu C and mass 1.60 g, is projected toward q_{1}. When the two spheres are 0.800 rm m apart, q_{2} is moving toward q_{1} with speed 22.0 rm m/s . Suppose that the two spheres can be treated as point charges. You can ignore the force of gravity. What is speed of q_{2} when the balls are 0.450 m apart?
Question2
The gravitational force exerted on a baseball is 2.25 N down. A pitcher throws ball horizontally with velocity 15.0 m/s by uniformly accelerating it all along a straight horizontal line for a time interval of 177 ms. The ball starts from rest.
Throughout what distance does it move before its release?